The term 'left open-mouthed' is an expression used to describe someone who is in a state of awe or amazement. This expression can be represented by two crossword solutions, 'AWED' and 'inawe', both of which have four and five letters respectively. The term 'AWED' is an adjective that means filled with admiration, wonder, or respect, while the term 'inawe' is a verb that means to inspire awe or admiration.